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@INPROCEEDINGS{Schpers:1032490,
      author       = {Schäpers, Thomas},
      title        = {{S}uperconductive {C}oupling and {J}osephson {D}iode
                      {E}ffect in {T}opological {I}nsulator-{B}ased
                      {M}ulti-{T}erminal {H}ybrid {S}tructures},
      school       = {Tohoku University},
      reportid     = {FZJ-2024-06283},
      year         = {2024},
      note         = {Deutsche Forschungsgemeinschaft (DFG, German Research
                      Foundation) under Germany’s Excellence Strategy - Cluster
                      of Excellence Matter and Light for Quantum Computing (ML4Q)
                      EXC 2004/1 – 390534769 Bavarian Ministry of Economic
                      Affairs, Regional Development and Energy within Bavaria’s
                      High-Tech Agenda Project "Bausteine für das
                      Quantencomputing auf Basis topologischer Materialien mit
                      experimentellen und theoretischen Ansätzen" (grant no. 07
                      02/686 58/1/21 1/22 2/23).},
      abstract     = {The combination of s-type superconductors with
                      three-dimensional topological insulators creates apromising
                      platform for fault-tolerant topological quantum circuits
                      based on Majorana braiding. Thebackbone of the braiding
                      mechanism is a three-terminal Josephson junction. To
                      implement this concept,a deeper understanding of the
                      underlying mechanisms in topological insulator nanoribbon
                      networksequipped with superconducting electrodes is
                      required. The samples for our experiments are fabricatedby a
                      combination of selective area growth of the topological
                      insulator and shadow mask evaporation ofthe superconductor.
                      As a first step, we investigate nanoribbon kinks and
                      T-junctions of the topologicalinsulator [1,2]. In kink
                      structures, a π-periodic change of the conductance is
                      observed as a function ofthe angle of an in-plane magnetic
                      field. We attribute this phenomenon to an orbital effect
                      leading to analignment or misalignment of the phase-coherent
                      states on the lower and upper surfaces of the kinkbranches
                      depending on the magnetic field orientation. The
                      experimental results are supported by atheoretical analysis
                      based on a surface Rashba-Dirac model and tight-binding
                      simulations. As a nextstep, the transport properties of
                      topological insulator-based three-terminal Josephson
                      junctions aremapped and the cross-coupling of the junctions
                      is analyzed. Under the application of an
                      out-of-planemagnetic field, a multi-terminal geometry
                      induced diode effect is observed.start here. Only one
                      pageabstract including figures and references.Work done in
                      collaboration with: Gerrit Behner, Abdur Rehman Jalil,
                      Kristof Moors, MichaelSchleenvoigt, Jonas Kölzer, Erik
                      Zimmermann, Alina Rupp, Peter Schüffelgen, Hans Lüth,
                      DetlevGrützmacher.References[1] Kölzer, J.; Jalil, A. R.;
                      Rosenbach, D.; Arndt, L.; Mussler, G.; Schüffelgen, P.;
                      Grützmacher,D.; Lüth, H., Schäpers, T. Supercurrent in
                      Bi4Te3 topological material-based three-terminaljunctions,
                      Nanomaterials, 13, 293 (2023)[2] Behner, G.; Moors, K.;
                      Zhang, Y.; Schleenvoigt, M.; Rupp, A.; Zimmermann, E.;
                      Jalil, A. R.;Schüffelgen, P.; Lüth, H.; Grützmacher, D.,
                      Schäpers, T. In-plane magnetic field drivenconductance
                      modulations in topological insulator kinks, Phys. Rev. B,
                      109, 155429 (2024)},
      month         = {Nov},
      date          = {2024-11-05},
      organization  = {6th Workshop on Quantum and Classical
                       Cryogenic Devices, Circuits, and
                       Systems, Sendai (Japan), 5 Nov 2024 - 6
                       Nov 2024},
      subtyp        = {Invited},
      cin          = {PGI-9},
      cid          = {I:(DE-Juel1)PGI-9-20110106},
      pnm          = {5222 - Exploratory Qubits (POF4-522)},
      pid          = {G:(DE-HGF)POF4-5222},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/1032490},
}